BuildCraft version: BuildCraft 7.99.14 for Minecraft 1.12.2
Forge version: 1.12.2-14.23.1.2590
Link to crash report or log:
Singleplayer or multiplayer: Singleplayer
Additional information: I want to use the combustion engine to pump the fuel that is distilled in the distiller into a tank. The combustion engine will not pump out of the wooden fluid pipe connected to the distiller. I believe this is a Bug. I appreciate the hard work, Buildcraft is by far my favorite Minecraft mod.

Have you got some screenshots of your setup? can you show them? Thanks!

Ill take some @LuigiHutch but another bug I'm dealing with is that my pipes are invisible

I believe that is the same as #3960 Read the comments on that issue which may help resolve that issue

@LuigiHutch I really appreciate your response, I turned off the swappable sprites option and that took care of that issue. Hang tight for the pic of my setup.

Please Ignore the sloppiness, I changed my setup to accommodate for the alleged bug. The combustion engine I have hooked up to pump out of the distillery is rising in heat, which I believe means it should be working but you can see the system is haulted because it is not pumping out the fuel. I have been using buckets to transfer the fuel from the distillery to my tanks. @LuigiHutch

I also noticed that fuel fills from the top down in the tanks instead of rising from the bottom.

BC oil processing has been completely redone. Here is a basic guide about how the new blocks work: http://imgur.com/a/AXUOX

For your setup in short, you need to extract the fluids out the top and bottom :)

Duplicate of #3737

@LuigiHutch Ahhh, I figured I was doing something wrong. Thanks for the help, I'll get the hang of it.

If you have anymore questions about the processing or something else, I recommend just popping in and asking in our discord as it makes it easier and quicker to help: https://discord.gg/v4geqgA